From c3f49b715845ecbadcc21b1b77c821f4d58f93cd Mon Sep 17 00:00:00 2001
From: Tuna <ng.tuna@gmail.com>
Date: Thu, 16 Aug 2018 17:13:32 +0700
Subject: [PATCH] hotfix - bypass signer check at CP header

---
 consensus/clique/clique.go | 16 ----------------
 1 file changed, 16 deletions(-)

diff --git a/consensus/clique/clique.go b/consensus/clique/clique.go
index 0a653c8531..ec7c5f4139 100644
--- a/consensus/clique/clique.go
+++ b/consensus/clique/clique.go
@@ -350,22 +350,6 @@ func (c *Clique) verifyCascadingFields(chain consensus.ChainReader, header *type
 	if parent.Time.Uint64()+c.config.Period > header.Time.Uint64() {
 		return ErrInvalidTimestamp
 	}
-	// Retrieve the snapshot needed to verify this header and cache it
-	snap, err := c.snapshot(chain, number-1, header.ParentHash, parents)
-	if err != nil {
-		return err
-	}
-	// If the block is a checkpoint block, verify the signer list
-	if number%c.config.Epoch == 0 {
-		signers := make([]byte, len(snap.Signers)*common.AddressLength)
-		for i, signer := range snap.signers() {
-			copy(signers[i*common.AddressLength:], signer[:])
-		}
-		extraSuffix := len(header.Extra) - extraSeal
-		if !bytes.Equal(header.Extra[extraVanity:extraSuffix], signers) {
-			return errInvalidCheckpointSigners
-		}
-	}
 	// All basic checks passed, verify the seal and return
 	return c.verifySeal(chain, header, parents)
 }